Question

I have a string like “My String 2” and I like to get only num value “2”.
I try to do that you see below but result is egal to 0.

$AlphaSURV1="My String 2";
$NumSURV1=intval($AlphaSURV1);
echo $NumSURV1;

Can you help me to solve that?

Thanks

Answer 1

In order to capture the last group of digits in a string, you can use a regular expression:

$str = "123 test 29";
preg_match("/[0-9]+$/", $str, $matches);
var_dump($matches[0]); # 29

This work correctly for all the following cases, including lack of whitespace, leading digits and multiple digits at the end of the string:

"1"        => 1
"test 2"   => 2
"test 34"  => 34
"5 test 6" => 6
"7test8"   => 8

Note that if you simply want to get the last character in the string and treat it like a number you can use the following:

$str = "My String 2";

$digit = intval(substr($str, -1));